| Summary |
Peak wind force coefficients for designing the cladding of open-type framed membrane structures are proposed on the basis of a wind tunnel experiment. Three types of gable-end configurations, that is, open type, partially enclosed type and enclosed type, are tested in the present study. First, the peak wind force coefficients are specified based on the distributions of the most critical maximum and minimum peak wind force coefficients irrespective of wind direction. Then, using the Type I extreme value distribution, the wind force coefficients for cladding are estimated. Using this distribution, it is possible to estimate the peak wind force coefficients for any value of non-exceedance provability. Furthermore, the combination of the external and internal peak wind pressure coefficients for estimating the peak wind force coefficients is discussed. Peak wind force coefficients in the edge region can be estimated reasonably by combination the peak external and internal wind pressure coefficients. However, such a combination generally overestimates the design wind force coefficients in the other regions, where the peak wind force coefficients are relatively small in magnitude. Then, the internal wind pressure coefficients are estimated by the difference between the peak external wind pressure coefficients for enclosed type and the peak wind forces coefficients for open type or partially enclosed type. Based on the results, we proposed internal pressure coefficients to be combined with the peak external pressure coefficients on enclosed buildings for estimating the peak wind force coefficients on open type and partially enclosed type buildings. The proposed internal wind pressure coefficients reasonably provide the wind force coefficients for the open type and partially enclosed type. Provided that the internal pressure coefficient is minutely affected by the roof configuration the proposed internal pressure coefficients can be used for estimating the peak wind force coefficients on open type buildings with various roof configurations. |